They should fix some of their home/wiki pages. Mention of "StellarPad" support is buried in the fine print.

Homepage:

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Energia is a rapid electronics prototyping platform for the Texas Instruments msp430 LaunchPad. Energia is based on Wiring and Arduino and uses the Processing IDE. The sources for the project are on the Energia github.com project page.

Github Readme.md:

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Energia is a fork of Arduino for the Texas Instruments MSP430 Micro Controller.